What does the prefix "cyst-" refer to?

The prefix "cyst-" originates from the Greek word "kystis," which means "sac" or "bladder." In the context of medical terminology, it typically refers to a fluid-filled sac or capsule within the body, often associated with particular tissues or organ systems. This understanding aligns perfectly with the notion of a "bag," as a cyst can be seen as a bag-like structure containing fluid or semi-solid material.

In contrast, the other options do not relate to the meaning of "cyst-." The term related to "cell" typically uses prefixes like "cyto-," while "skin" would be represented by the prefix "derm-." Lastly, "tooth" corresponds to "odont-" in medical terminology. Each of these terms stems from different Greek or Latin roots, clarifying why "cyst-" is correctly identified as relating to a "bag."